I used a really thick gasket on my 40 when I put headers on. it was pretty expensive($50?) but definitely worthit If your interested PM and I will try and figure out who I bought it from and who used it.

My F engine not only sounds much healithier but has much better high end performance, made a big difference on the highway.

I used a really thick gasket on my 40 when I put headers on. it was pretty expensive($50?) but definitely worthit If your interested PM and I will try and figure out who I bought it from and who used it.

My F engine not only sounds much healithier but has much better high end performance, made a big difference on the highway.